C. P. NJOKU, A. B. J. AINA, O. M. SOGUNLE, and O. O. ODUGUWA, “Growth performance, linear body measurements and carcass characteristics of intact and castrated growing pigs”, Indian J of Anim Sci, vol. 83, no. 6, June 2013, doi: 10.56093/ijans.v83i6.30649.